Year	Percent
1950	28.66816
1955	28.76299
1960	28.57681
1965	28.18528
1970	27.42262
1975	26.41135
1980	26.26126
1985	26.84858
1990	26.63429
1995	27.56612
2000	28.12163
2005	28.56535
2010	28.72233
2015	27.20468
2020	28.32445
2025	30.4398
2030	32.01174
2035	32.76541
2040	32.41844
2045	31.97354
2050	31.81832
2055	31.78156
2060	31.72883
2065	31.21382
2070	30.38865
2075	29.52922
2080	28.81528
2085	28.21591
2090	27.61362
2095	26.94631
2100	26.23702